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Fixed #4728 (simplify known variables better (%var% & %num%, bitwise and))

This commit is contained in:
Daniel Marjamäki 2013-06-26 18:13:28 +02:00
parent 2265c61734
commit c389e08353
3 changed files with 9 additions and 17 deletions
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4
lib/tokenize.cpp
View File

@ -6399,9 +6399,9 @@ bool Tokenizer::simplifyKnownVariablesSimplify(Token **tok2, Token *tok3, unsign
}
// Using the variable in condition..
if (Token::Match(tok3->previous(), ("if ( " + structname + " %varid% %comp%|)").c_str(), varid) ||
if (Token::Match(tok3->previous(), ("if ( " + structname + " %varid% %cop%|)").c_str(), varid) ||
Token::Match(tok3, ("( " + structname + " %varid% %comp%").c_str(), varid) ||
Token::Match(tok3, ("%comp%|! " + structname + " %varid% %comp%|)|;").c_str(), varid) ||
Token::Match(tok3, ("%comp%|!|= " + structname + " %varid% %cop%|)|;").c_str(), varid) ||
Token::Match(tok3->previous(), "strlen|free ( %varid% )", varid)) {
if (value[0] == '\"' && tok3->previous()->str() != "strlen") {
// bail out if value is a string unless if it's just given

15
test/testnullpointer.cpp
View File

@ -54,7 +54,6 @@ private:
TEST_CASE(nullpointer19); // #3811
TEST_CASE(nullpointer20); // #3807 (fp: return p ? (p->x() || p->y()) : z)
TEST_CASE(nullpointer21); // #4038 (fp: if (x) p=q; else return;)
TEST_CASE(nullpointer22); // #4007 (fp: (uri != NULL) && (*uri == 0))
TEST_CASE(nullpointer23); // #4665 (false positive)
TEST_CASE(nullpointer_cast); // #4692
TEST_CASE(nullpointer_castToVoid); // #3771
@ -891,12 +890,6 @@ private:
"}");
ASSERT_EQUALS("", errout.str());
check("void f() {\n"
" Foo *p = 0;\n"
" bool b = (p && (p->type() == 1));\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void foo()\n"
"{\n"
" int sz = sizeof((*(struct dummy *)0).x);\n"
@ -1237,14 +1230,6 @@ private:
ASSERT_EQUALS("", errout.str());
}
void nullpointer22() { // #4007 - fp: (x != NULL) && (*x == 0)
check("void f() {\n"
" int *p; p = 0;\n"
" int result = p && (!*p);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void nullpointer23() { // #4665
check("void f(){\n"
" char *c = NULL;\n"

7
test/testtokenize.cpp
View File

@ -173,6 +173,7 @@ private:
TEST_CASE(simplifyKnownVariables49); // #3691 - continue in switch
TEST_CASE(simplifyKnownVariables50); // #4066 sprintf changes
TEST_CASE(simplifyKnownVariables51); // #4409 hang
TEST_CASE(simplifyKnownVariables52); // #4728 bitand
TEST_CASE(simplifyKnownVariablesIfEq1); // if (a==5) => a is 5 in the block
TEST_CASE(simplifyKnownVariablesIfEq2); // if (a==5) { buf[a++] = 0; }
TEST_CASE(simplifyKnownVariablesBailOutAssign1);
@ -2691,6 +2692,12 @@ private:
tokenizeAndStringify(code, true); // don't hang
}
void simplifyKnownVariables52() { // #4728 bitand
const char code[] = "void f() { int x=34; int y=x&z; }";
ASSERT_EQUALS("void f ( ) { int y ; y = 34 & z ; }",
tokenizeAndStringify(code, true));
}
void simplifyKnownVariablesIfEq1() {
const char code[] = "void f(int x) {\n"
" if (x==5) {\n"